9 UL 489 Cable-In / Cable-Out Branch Circuit Breaker WMZ Circuit Breakers PRODUCT OVERVIEW EATON CORPORATION Cable-in / cable-out circuit breakers and protectors Optimum and Efficient Protection Optimum product quality, tested reliability and safety standards for best protection of personnel, installations and plant Eaton’s WMZ DIN rail mountable circuit breaker is designed for use in branch service applications Powerful Offering for Machine and System Builders The WMZ is available with C and D characteristics in accordance with UL 489, CSA C222 No5; UL 1077, CSA C222 No235 and IEC 60947-2 These devices are CE marked Typical Applications Feeder and Branch Circuit Protection • Convenience receptacle circuits (internal/external) • Motor control circuits • Load circuits leaving the equipment (external) • HACR equipment (heating, air conditioning, refrigeration) (internal/external) • PLC I/O points • Computers • Power supplies • Control instrumentation • Relays • UPS • Power conditioners Features • Complete range of UL 489 listed DIN rail mounted miniature circuit breakers up to 40A current rating • Standard ratings of 10 kAIC at 277/480 Vac • Select amperages available at 14 kAIC at 277/480 Vac and 10 kAIC at 125 Vdc • Current limiting design provides fast short-circuit interruption that reduces the let-through energy, which can damage the circuit • Suitable for branch circuit device protection • Thermal-magnetic overcurrent protection — Two levels of short-circuit protection, categorized by C and D curves • Trip-free design—breaker can not be defeated by holding the handle in the ON position • Captive screws cannot be lost • SWD (switching duty)—suitable for switching fluorescent lighting loads (I n ≤ 20A) • Fulfill UL 489, CSA C222 No5 and also IEC 60947-2 Standard • For use in applications for which UL 1077 or CSA C222 No235 are also allowed • Field-installable shunt trip and auxiliary switch subsequent mounting • Separate version for ring-tongue connection (Type WMZT…T), terminal screws can be removed (on both sides) • Module width of only 177 mm (per pole) • Contact Position Indicator (red/green) • Easy installation on DIN rail • Possibility for sealing the toggle in ON or OFF position WMZ Complies with the Latest National and International Standards Standards—Feeder and Branch Circuit Protection UL 489 Standard for molded-case circuit breakers (MCCB) for feeder and branch circuit protection. Products meet the requirements of the National Electrical Code ® (NEC ® ). CSA C22.2 No.5 Standard for molded-case circuit breakers (MCCB) for feeder and branch circuit protection (corresponds closely to UL 489 Standard). Products meet the requirements of the Canadian Electrical Code (CEC). RoHS These devices are RoHS compliant. WMZ Circuit Breakers Product Overview
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UL 489 Cable-In / Cable-Out Branch Circuit BreakerWMZ Circuit Breakers
PRODUCT OVERVIEW
EATON CORPORATION Cable-in / cable-out circuit breakers and protectors
Optimum and Efficient Protection
Optimum product quality, tested reliability and safety standards for best protection of personnel, installations and plant . Eaton’s WMZ DIN rail mountable circuit breaker is designed for use in branch service applications .
Powerful Offering for Machine and System Builders
The WMZ is available with C and D characteristics in accordance with UL 489, CSA C22 .2 No .5; UL 1077, CSA C22 .2 No .235 and IEC 60947-2 . These devices are CE marked .
EATON CORPORATION Cable-in / cable-out circuit breakers and protectors
Tripping Curves to Choose From
Eaton WMZ branch circuit breakers are available with “C” and “D” tripping characteristics .
C-curve devices are suitable for applications where medium levels of inrush current are expected . Applications include small transformers, lighting, pilot devices, control circuits and coils . C-curve devices provide a medium magnetic trip point .
D-curve devices are suitable for applications where high levels of inrush current are expected . The high magnetic trip point prevents nuisance tripping in high inductive applications such as motors, transformers and power supplies .
Eaton WMZ devices are current limiting, which means they interrupt fault currents within one half cycle of the fault . Current limiting devices offer superior protection by reducing peak let-through current and energy .
Catalog Numbering System
Device Printing on Front and Side
Installation options
These branch circuit breakers are available in two terminal configurations: standard box terminals that accept multiple conductors and ring-tongue terminals, ideally suited to demanding requirements of the semi-conductor industry . All breakers mount on standard 35 mm DIN rail . Bus connectors and feeder terminal facilitate mounting and wiring of multiple miniature circuit breaker arrays in control panel assemblies . These circuit breakers can also be reverse feed .
tripping characteristic acc . to UL 489 conventional non-tripping
current Int = 1.0 IN (T=40°)
conventional tripping current It = 1.35 IN: t < 1 h (T=25°)
2.0 IN: t = 12–120 s (T=25°)
instantaneous tripping acc . to IEC 60898-1 type C: 5 IN: t > 0.1 s
10 IN: t < 0.1 se type D: 10 IN: t > 0.1 s
20 IN: t < 0.1 s
Conductor Type
Calibration Temperature UL/CSA
Rated Voltage UL/CSA
Breaker Status Indicator
Catalog Number
Rated Current
WMZ T 1 C 16 T
Breaker Family
WMZ = WMZ UL circuit breaker Number of Poles
1 = Single-pole2 = Two-pole3 = Three-pole
Terminal
T = Ring terminals[blank] = Standard box terminals